Electric storage batteries



cornbination has proved t be highly Satisfactory' 'l'his Sandwich arrangen1ent is assembled in a pennanent n]anner by Ineans of an 0Verlapping border lining 17 comrising a varnish n1aterial Such as 1)araHin. The separator 18 thus produced is SubStantilly c0extensive ith the insert The Whole aSembly df th('ctiv nd Sepafamr n]aterias iS impregnated with electfolyte, desirably a cbncentrated aqueous Solution of Zinc ch10ride, aS de- Cribed in my aforernentioned cd-pending IJ.S( patent application Ser' No S06,Z63, and is immersed in 2i casing 19. The Separators and inserts are in contact vvith the casing exclusively through their paainoated edges. The active electrode assembly, consisting of the elCtrb chemicany active Sub8tances and the paTt of the sepra torS upon Whose 0'pposite Sides they bear, is placed by the surrounding casing (not shown) uhder i ressure efec Tive to secure an intimate contact between the adjcent Surfaces. The ends of the b10ck are rovided by tvv() graphite inserts lo and lo COnncted by vvire conductors (not Shdwn) to the battery tern1i nals Should gases evolve during the ]ctToche ical e actions, such gases will in all cases be anowed d discharge Since at no point is there provided a tight Seal enc10sing the active Substances{ T]1e electT0lyte-impreg nted active Substances, in particular, are SiIn )1y urged gainSt each of the opp0sitc Sides of an insert but are not bonded theret0 IIigh local pressures liabe t0 expel the liquid electrolyte out of the central area in WIlich it is connned cannot occur.

what I claim iS;

1. An electric battery comprising a casing, a lurality 0f cells fdrming a stack in said casing and including each 2 positive electrode, a negative electrode and an electr0 1yte-pern]eable Separat0r between said eectr0des, intercell connector means in Said stack includi11g a conduc tive insert between each pair of adjoining cens, Said insert being in conductive contact vvith the positive elec trode df one cel and VVith the negative electrode of the other cell of Said pair, and a p ir of tern1inal plates positioned at opposite endS Of Said stack in conductive contact with the outerrn0st electr0dS h(re()f, respectively, Said insert, Said Separator and Said tern]inal plates bridging dpp0site casing Waus and making uidtight contact there- 'with, Said positive and negative electrodes being each Spaced from Said 0pposite casing Walls vvhereby electr0 lytec0nning Spaces are formed around all of Said elec trodes betvveen Said insert, Said Separator and Said terminal plates 2- A battery according to clain1 Vherein nlarginal portions df Said tern1inal plates, Said insert and Said Separator, projecting beyond Said electrodes and engaging said casing Wans, are provided With hydrophobic coatings preventing migration of electrolyte along said Walls References (;ited in the I lle of this paten UNTTED STATES PATENTS 1,6S8,062 S ra ue Feb 7 1928 l662866 Salazar Mar 20, 1928 l 76 ,673 Huntley June 24, 1930 1,9Z0,1Sl Ruben Iul 2j, 1933 2'Sl6 09l Renaud Iuly 18, 19j0 Z,S19,0S4 Woodrin Au l 1950 z 83,063 Richardsdn Ian( 22 19Sz Z 677 ljl Ieannings May 4, l9j4 2 689'877 Bri s Se t. Zl 1954 2708684 Grieve Ma 17, 19SS Z,740,8Zl Bone A r' 3' 1956 

